/*
 * @Description: 
 * @Author: liuzl
 * @Date: 2024-09-24 17:00:21
 * @LastEditors: liuzl
 * @LastEditTime: 2024-09-24 17:00:21
 */
/**
 * Main
 */
public class Main {

    public static void main(String[] args) {
        A a = new B();
        a.show();
    }
}